Abeam alexander



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IMPROVEMENT l1N MAGMINi-:s ron MAKING BoLTs.

ein Stigtmle referrer tu iu time Mettiti what mit making tart nf 'tigesamt.

T0 ALL WHOM IT MAY GONCERN: l Y

Be it known that I, .ABRAM ALEXANDER, ofthe city of Pittsburg, countyot'eAllegheny, and State of Penn- Sylvania, have invented certainImprovements in Bolt-Making Machine; and I do fhereby declare that thefollowing is a full and exact description thereof. Y This inventionrelates to an improvement in that part of a bolt-making machine which isdesigned to operate on the griping-dics opening and closing machinery;and it consists in the following combination andv arrangement of lever,cam, aihd weight, by which no accidental breaking ofthe machine can takeplace from the careless or accidental fouling of the griping-dies byblanks or other obstructions.

A is the frame of the bolt-making machine; B is theshaft, and C is thecam intended Vto'ropcrate the closing and opening machinery of thegriping-dies; D is a bolt or sliding bar, working freely inthe guides EE. This bar, D, is connected to and operates upon the Vgriping-diesclosing and opening` machinery of the holtlmaking machine in the'mannerdescribed in my application for patent for the same; and all that isnecessary to our present purpose is to know that the bar D, in moving inthe direction of the arrow P, will close the dies, and that when itmoves in the direction of the arrow S, it will open the dies. G- is alever,`pivvoted on the bolt g fast to the frame A. The lower part of thelever Gr is engaged in a notch, d, in the bar D, so .that an oscillatingmotion given to the lever Gr will cause the bar-D to slide in 4thedirection of the arrows P or S. T is a small piece or vtoggle together.The lever M is pivoted on theholt or pin N, and it has a chain, spring,or belt, R, fastened to its end, and to which is suspended the weight W,as represented in my drawings. l In my improved bolt-machine, for whichI have made application for patent, the bolt-piece `D (marked in thatapplication P) receives its motion in both directions (arrows P and S)in an immovable, rigid, and limited manner from the action of a cam; inother `words, the Ycam is made to act as well for opening as for closingthe dies, and it is evident that if any impediment is placed to theclosing of said'dies, something has t'o break in the machine. In mypresent improvement,the cam C acts only in one direction on the bar Dthrough the lever G, and that in the direction of arrow S, for openingthe dies, keeping them open as long as necessary the full-strokev shapeof thecam; but the motion required for closing the dies Ve.,'the` motionin the direction of the arrow P) is obtained from the weight lW actingon the lever M, and through the toggle-pinT on the bar'D,

so that any fouling of the griping-dies will only prevent thc weightfrom falling, .and'its position, as in Figure i 1, will indicate at oncethat something is wrong, but no breaking of any parts of the machine canever Aoccur from the bolt-blank being introduced in an improper mannerin the griping-dies.

Claim.

What I claim as my improvement is- V The combination and arrangement ofthe cam C, levers Gr and M, bar D, andpin-T, with the weight W, or

a spring, acting substantially in the saine manner, when used andapplied to operate the griping-dies closing lv nachinery described in myimproved bolt-making maeliine,.or any other, substantially the same.

ABRAlS/I ALEXANDER. [1.. 15.] Witnesses:

CH. S. SNowDEN, Jos. SNowDnN.

pin engaged in proper vrecesses in the end of the bar-.D and in thelever 'M','toV connect the same

